One may use eq. REF  to match the \( U(1)_{B_3-L_2}\)  model to fits of \(b \rightarrow s \mu ^+ \mu ^-\) data, as was done in ref. [1]}. This condition lets us
eliminate the mixing angle \( \theta _{sb}\)  and leaves us with two free
parameters relevant to \(B\)  decay data: \( M_{Z^\prime } \)  and \( g_{Z^\prime } \) .
Defining the dimensionless quantity \( x \)  as
\(x g_{Z^\prime } \frac{1 \text{~TeV}}{M_{Z^\prime }},\) 
